Other mining engineers of note were FREDERICK ANTON
EJLERS; MAX BOEHMER; ALBERT ARENTS, inventor of the lead-mine machinery; C. W.
KJRCHHOFF; F. AUGUSTUS HEINZE, founder of the Amalgamated Copper Company, C. de
KALB, HERMAN GMELIN, and others, who as consulting engineers or presidents of
mining corporations rank high in their profession and are known throughout the
Union.

HERMAN SCHÜSSELE constructed the great
waterworks of San Francisco. His monograph on "The water supply of San
Francisco before, during and after the earthquake of April 18, 1906," is a
valuable contribution to technical literature.

The greatest achievements in engineering, however,
have been accomplished in America by German bridge-builders. The names of
ALBERT FINK, ADOLF BONZANO, HEINRICH
FLAD, JOHANN AUGUST ROEBLING, WASHINGTON
ROEBLING, KONRAD SCHNEIDER,
GUSTAV LINDENTHAL, EDUARD HEMBERLE and PAUL WOLFEL are inseparably
connected with the history of engineering in America. Several of these men were
refugees of 1848, as for instance ALBERT FINK. Born 1827 at Lauterbach, he had
been trained at the polytechnic school of Darmstadt. In 1849 he emigrated to
America and entered the service of the Baltimore & Ohio Railroad, for which he constructed many viaducts and
iron bridges, among them the great iron bridge over the Ohio River at
Louisville. In the construction of these bridges he employed an invention of his own, a system of
girders allowing of a length of span theretofore unknown. The greatest of these
girders are found in the Ohio River Bridge at Louisville, which has a total
length of 5,310 feet. Of its 27 spans the largest measure 340 and 360 feet.
Several of the viaducts, constructed by Fink, especially those over the ravines
of Cheat Mountain, were considered the most marvelous of their kind.

HEINRICH FLAD, born in 1824
in Baden, had studied engineering at the university in Munich. He participated
as colonel of a battalion of engineers in the revolution of 1848. In 1849 he
arrived in America and was for a number of years very successful in
constructing of western railroads.

A contemporary of Fink and
flad was ADOLF BONZANO, born 1830 in Wurtemberg. As chief engineer and vice-president of the Phoenix Bridge Company
he made the designs for many railroad-bridges. The most interesting of his
works was a viaduct across the valley of the Kinzua River in Pennsylvania,
which is 1800 feet wide and 270 feet deep and was completed in only 8 months.

A complete revolution in bridge-building
was brought about by JOHANN AUGUST ROEBLING, whose great achievements have been mentioned in another chapter.